I grew this plant from seed labeled Aster himalaicus. I cannot find much info about this species. I am not even convinced it is an Aster...I think its an Erigeron. The first pic was the first year it blooms (3 years ago), the second pic was taken last summer....it is getting pretty big.
Looks like an Erigeron to me too.
Of course, in N.America, we have no asters anymore... they're all relegated among 6 other genera... dang taxonomists.
Yes, the reclassification of 'aster' in North America is a real pain. It is now up to 10 new genera! I cannot even pronounce the new names! Almutaster, Canadanthus, Doellingeria, Eucephalus, Eurybia, Ionactis, Oclemena, Oreostemma, Sericocarpus and Symphyotrichum...Aster is so much easier to remember!
Definitely an Erigeron (more than 50 ray flowers and involucre that consists of narrow, linear segments rather than spiny projections)...
I have grown several dozen Erigeron in my day, and none of them match your's: its magnificent...any seed?
I didn't collect seed since I was not sure what it was. I grew Erigeron flettii from the same source as this 'Aster' and the Aster yunnanensis and the flettii ended up E. glaucus. The source was a BG in Austria. Guess the Europeans are as confused with these daisies as we are!